S2317HWi, Vostro 470, HDMI

I have brand new S2317HWi. I've bought it some weeks ago. I'm not sure if the S2317HWi is defective or normal. I have Dell Vostro 470, Windows 10-64bits, wireless card on board. I'm using the HDMI connection from Vostro 470 to the S2317HWi.

1) When I start the S2317HWi, I see an image that say "connect your device".

2) When I start the Vostro 470, I don't see the Dell logo, I only see on the S2317HWi connect your device.

3) To see the Vostro 470, I have to change it manually to see it via HDMI and when the Vostro 470 go slip the S2317HWi show again "connect your device" so again I have to change manually from Wireless Connection to HDMI connection.

The main concern is that the S2317HWi never stay default at HDMI only on Wireless connection.

Guys, I need your advise about this issue.

Thanks